JP4287806B2 - Movable mold of molding machine with transfer board - Google Patents

Description

  The present invention relates to a movable mold of a molding machine provided with a transfer board that performs two-color molding, insert molding, and the like by rotating or reciprocating a mold.

  Injection molding machines such as two-color molding machines, insert molding machines, composite molding machines made of different materials resin, etc., equipped with a transfer means such as a rotary disk or slide disk on the surface of a movable or fixed plate. Alternatively, a movable mold that closes both the primary molding fixed mold and the secondary molding fixed mold is provided at a symmetrical position of the slide disk (hereinafter referred to as transfer board), and the movable mold is primary molded fixed mold by the transfer board. And the secondary molding fixed mold so that primary molding and secondary molding of the molded product can be performed continuously.

  As is well known, a projecting mechanism is provided inside the movable mold to project the injection-molded molded product away from the core mold of the mold plate. This projecting mechanism consists of a projecting plate provided in a spacer block between a mold mounting plate and a projecting projecting core mold, and a projecting plate that can be moved forward and backward. A molded product that is attached to the core mold by moving forward with the projecting plate by pushing out the projecting rod in the movable plate that is in contact with the projecting plate through the mold mounting plate. Can be separated from the core mold.

Usually, the protruding rod is provided in the movable plate so that the tip does not protrude from the surface of the plate on which the mold mounting plate of the movable plate is installed. For this reason, when not operating, the tip is waiting at a retracted position separated by the plate thickness of the mold mounting plate, and the protruding operation is started after the protruding rod moves forward through the plate thickness. . The delay due to the empty operation of the protruding operation also affects the shortening of the molding cycle time. In some cases, the idle operation of the projecting rod is improved by inserting a projecting block attached to the projecting plate into a through hole formed in the mold mounting plate and pressing the projecting block through the projecting block.
JP 2001-179767 A JP-A-9-155932

  The idle operation of the protruding rod in the molding machine equipped with the transfer board affects the molding cycle time more than in the case of a normal injection molding machine. In this molding machine, the protruding rod is kept waiting at a position that does not hinder the rotation or slide of the transfer board. Therefore, the idle movement distance of the protruding rod is added to the board thickness of the mold mounting plate. Because. The idle operation time from the start of this operation until the tip of the projecting rod hits the projecting plate is very short.However, if molding is performed continuously over a long period of time, it will result in a large molding time loss. However, it becomes a waste of energy consumption and prevents a reduction in molding cost.

  When trying to solve the empty operation of the protruding rod in the molding machine equipped with this transfer plate by adopting the above-mentioned conventional technique performed in the movable mold of a normal injection molding machine, the protruding rod is also attached to the transfer plate. It is inserted into the drilled through hole, and the tip is placed on the end face of the protruding block to stand by. However, in such a state, since the protruding rod becomes an obstacle to the movement of the transfer board, the protruding rod cannot be made to stand by in the transfer board. Stops thick.

  It is an object of the present invention to provide a transfer board having a new configuration capable of shortening the protrusion operation time than before by preventing the protruding operation of the protruding rod in the entrance / exit hole in the transfer board by a protruding block. Another object of the present invention is to provide a movable mold for a molding machine.

According to the above-mentioned object, the present invention provides a projecting plate and a rear end fixed to the projecting plate in a spacer block between a mold mounting plate and a projecting plate provided with a core mold so that the tip is positioned on the core mold surface. A movable mold having a projecting mechanism comprising a projecting pin and attached to a transfer board provided in the molding machine by the mold mounting plate, and is formed in the mold mounting plate and the transfer board. A projecting block of a short column that fits in the protruding / exiting hole of the projecting rod by the provided through-hole and that does not project from the transfer board is projected, and the end surface of the projecting block is projected to the projecting rod The projecting block is detachably attachable to the short column body having the same length as the through hole of the mold mounting plate and the short column body having the same length as the through hole of the transfer board. It is formed by being connected to .

  In the above configuration, the movable mold can be attached to the transfer plate by inserting the protruding block protruding from the protruding plate into the input / output hole of the protruding rod provided between the mold mounting plate and the transfer plate. There is no space in which the protruding rod is idle. As a result, the projecting plate moves forward through the projecting block at the same time as the projecting rod moves forward, eliminating the operating time difference between the projecting rod and the projecting mechanism. Since the operation time is shortened and energy consumption required for the protrusion of the molded product is reduced, the molding cost can be reduced.

Also, as the protruding mechanism, it is only necessary to attach the protruding block of the short column to the protruding plate, so the short column forming the protruding block is divided into the mold mounting plate side and the transfer plate side as before. from what has been integrally connected to Te, since allows detaching said transfer platen side of the short column bodies protruding from the mold mounting plate, it is possible to divert movable mold in conventional injection molding machine.

  FIG. 1 shows an example of a rotary molding machine for two-color molding, in which 1 is a machine base, 2 and 3 are a pair of front and rear portions connected to each other by a tie bar 4 and 4 on the machine base. A fixed platen 5 is a movable platen that is inserted into the tie bars 4 and 4 so as to be movable forward and backward with respect to the front fixed platen 2, and 6 is a clamping cylinder fixed to the rear fixed platen 3. The mold clamping ram 7 is coupled to the mold clamping ram 7 so that the mold clamping can be performed by extending the mold clamping ram 7.

  The movable platen 5 is provided with a transfer plate 8 rotatably on the surface facing the front fixed platen 2, and a pair of movable molds 9, 9 are attached at symmetrical positions of the rotary plate 8. The movable molds 9 and 9 are mounted at positions where the primary molding fixed mold 10 and the secondary molding fixed mold 11 mounted on the front fixed platen 2 are alternately closed.

  Further, on the secondary molding side of the movable platen 5, a projecting rod 13 that moves forward the projection mechanism 20 described later in the movable mold through the entrance / exit hole of the through hole 12 formed in the transfer plate 8 is provided at the back of the movable platen. It is connected to the piston rod 15 of the projecting cylinder 14 so as to be able to advance and retreat. A projecting block 16 to be described later is inserted into the through-hole 12, and the projecting rod 13 moves the projecting mechanism 20 forward through the projecting block 16. In addition, although the illustrated protruding rod 13 is one, there may be a plurality. Needless to say, similar measures are taken when the molded product needs to protrude on the primary molding side.

  As shown in FIG. 3, the movable mold 9 includes a mold mounting plate 17, a mold plate 18 having a core mold 18a projecting from a parting surface, a spacer block 19 therebetween, and a protruding mechanism 20 in the spacer block. It consists of. The protruding mechanism 20 includes a protruding plate 21 provided so as to be movable forward and backward, and a plurality of protruding pins 22, 22 that are inserted through the mold plate 18, the rear end is fixed to the protruding plate 21, and the tips are positioned on the core mold surface. 4 and the return springs 23 and 23 around the projecting pins, and the projecting pins 22 and 22 are moved together with the projecting plate 21 by the forward movement of the projecting rod 13 against the return springs 23 and 23. As shown, the molded product 30 attached to the core mold 18a can be separated from the core mold 18a.

A through hole 24 having the same diameter as the through hole 12 of the transfer board 8 is formed in the central portion of the mold mounting plate 17. The through hole 24 is attached to the central portion of the protruding plate 21 with a screw. The projecting block 16 projecting is inserted. The projecting block 16 is accommodated in the access hole of the projecting rod 13 formed between the die mounting plate 17 and the transfer board 8 by the through holes 12 and 24, and has the same length as the access hole so long as it does not protrude from the transfer board 8. In the formed short column body, the short column body 16a having the same length as the through hole 24 of the die mounting plate 17 and the short column body 16b having the same length as the through hole 12 of the transfer board 8 are detachable. It consists of what was formed by connecting to.

  The movable mold 9 in which the short block projecting block 16 projects to the center of the mold mounting plate 17 is attached to the surface of the transfer board 8 by inserting the projecting block 16 into the through hole 12. In the through-hole 12, the end face of the protruding block 16 is located at a position where the end face of the protruding rod 13 operates almost simultaneously even if the protruding rod 13 is slightly moved forward. Although not shown in the figure, it is preferable that a stopper for suppressing the movement of the protruding block after the movable mold is removed from the transfer board is attached to the mold mounting plate or the protruding block.

  In such a configuration, there is no space in which the protruding rod 13 is idled in the entrance / exit hole, so that the protruding plate 21 is pushed through the protruding block 16 and moved forward simultaneously with the forward movement of the protruding rod 13. As a result, the operating time difference between the protruding rod 13 and the protruding mechanism 20 is eliminated, and even when the transfer plate 8 is provided, the protruding operation can be completed in a shorter time compared to the case where the transfer space is provided in the transfer plate. As the time is shortened, the production efficiency will be improved. Further, the energy consumption required for the protrusion of the molded product 30 is also saved by the shortening time.

The projecting rod 16 is detachably connected to a short column body 16a having the same length as the through hole 24 of the mold mounting plate 17 and a short column body 16b having the same length as the through hole 12 of the transfer board 8. Therefore , the movable column 9 can be diverted to a normal injection molding machine that does not require the transfer plate 8 by removing the short column 16b on the transfer plate side protruding from the mold take-out plate 17. .
The movable mold of the present invention is not only applicable to the transfer plate of the illustrated horizontal molding machine, but can be attached to the transfer plate of the vertical molding machine without any change.

It is a top view which shows the principal part of the two-color molding machine which attached the movable metal mold | die concerning this invention to the transfer board in a cross section. It is a perspective view in the mold closed state of the movable mold concerning this invention and a fixed mold. It is a plane sectional view in the state where a movable metallic mold was similarly closed with a secondary fabrication fixed metallic mold. It is a flat end view in the state which protruded the molded article.

Explanation of symbols

5 Movable plate 8 Through hole 13 in transfer plate 12 type mounting plate Protruding rod 16 Protruding block
Short column in the through hole of the 16a mounting plate
Short column in the through hole of 16b transfer board
17 type mounting plate 18 type plate 19 spacer block 20 protruding mechanism 21 protruding plate 22 protruding pin 24 through hole in transfer board

Claims (1)

Protruding mechanism comprising a projecting plate and a projecting pin with the rear end fixed to the projecting plate and the front end positioned on the core mold surface in a spacer block between the mold mounting plate and the projecting template plate. A movable mold that is used by being attached to a transfer board provided in a molding machine with the above-described mold attachment plate,
A short column body having a length substantially the same as the length of the entrance / exit hole within a range that fits in the entrance / exit hole of the projecting rod by the through-hole formed in the mold mounting plate and the transfer board and does not protrude from the transfer board. A projecting block is projected, and the end surface of the projecting block is positioned at the tip end surface of the projecting rod, and the projecting block has a short column body having the same length as the through hole of the mold mounting plate, and the transfer board. A movable mold of a molding machine provided with a transfer board, which is formed by detachably connecting a through hole and a short column having the same length .

Images